Who called from 2132322360

I've been receiving calls several times per day. When I first answered they didn't speak.
Whom ever it is they don't talk and do not leave a msg. So why are they calling at all?
I did find out that the calls are coming from a land line in L.A.

Same with me, calls my cell, never leaves a message - i am on a do not call registry with my cell, but the political calls still always come through. Ugh politics...

This person phones me two or three times a day. I have no idea who it is and there is never a message

Person asked for name.  When I asked who was called, she hung up.

I got a several calls today from this number. I didn't answer it and they didn't leave a message.